Surge current and thermal budget for the BOM
The 1.5KE440A A0G: Peak pulse current is 2.5 A at the 10/1000 µs test condition, meaning the diode can absorb a 2.5 A surge before the clamping voltage rises to 602 V. The DO-201AA axial-lead package (also known as DO-27) is a through-hole form factor suited for point-of-use transient suppression on power rails or signal lines where a replaceable, high-surge component is preferred over a surface-mount alternative.
Active production and sourcing posture
No pin-compatible successor or second-source cross-reference is recorded — the 1.5KE440A A0G is the current order code for this voltage variant in the 1.5KE series.